19440709542244 has 27 divisors (see below), whose sum is σ = 34069287721707. Its totient is φ = 9706646686464.

The previous prime is 19440709542239. The next prime is 19440709542323. The reversal of 19440709542244 is 44224590704491.

The square root of 19440709542244 is 4409162.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 14563855652644 + 4876853889600 = 3816262^2 + 2208360^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 9638427124 + ... + 9638429140.

Almost surely, 2^{19440709542244} is an apocalyptic number.

19440709542244 is the 4409162-nd square number.

It is an amenable number.

19440709542244 is a deficient number, since it is larger than the sum of its proper divisors (14628578179463).

19440709542244 is an frugal number, since it uses more digits than its factorization.

19440709542244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6224 (or 3112 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 19440709542244 in words is "nineteen trillion, four hundred forty billion, seven hundred nine million, five hundred forty-two thousand, two hundred forty-four".